package com.webserver.core;

import com.webserver.http.HttpRequest;

import java.io.*;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

/**
 * 处理与指定客户端的HTTP交互
 * HTTP交互采取一问一答，因此这里分为三步完成一次交互过程：
 * 1：解析请求
 * 2：处理请求
 * 3：响应客户端
 *
 */
public class ClientHandler implements Runnable{
    private Socket socket;

    public ClientHandler(Socket socket) {
        this.socket = socket;
    }

    public void run(){
        try {
            //1：解析请求
            HttpRequest request = new HttpRequest(socket);

            //2：处理请求
            //通过请求对象获取浏览器URL中的抽象路径部分
            /*
                http://localhost:9112/myweb/index.html
                http://localhost:9112/myweb/classTable.html
             */
            String path = request.getUri();
            //将webapps/myweb/index.html回复给浏览器
            File file = new File("./webapps"+path);
            //3：发送响应

            /*
                发送一个标准的响应，大致如下：
                HTTP/1.1 200 OK(CRLF)
                Content-Type: text/html(CRLF)
                Content-Length:2546(CRLF)(CRLF)
                101110101010101010
             */
            OutputStream out = socket.getOutputStream();
            //3.1：发送状态行
            String line ="HTTP/1.1 200 OK";
            //UnsupportedEncodingException 原有：字符集名字拼写错误！
            byte[] data = line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);//written CR
            out.write(10);//written LF

            line = "Content-Type: text/html";
            data = line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);

            line = "Content-length:"+file.length();
            data = line.getBytes("ISO8859-1");
            out.write(data);
            out.write(13);
            out.write(10);

            out.write(13);
            out.write(10);

            FileInputStream fis = new FileInputStream(file);
            byte[] buf = new byte[1024*8];
            int len;
            while ((len=fis.read(buf))!=-1){
                out.write(buf,0,len);
            }



        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                //交互完毕后与客户端断开连接
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }



}
